Mysterious Holes in Bare Foundation Soil: Antlions or Other?

A new homeowner sees circular, opening-less depressions in bare soil along the foundation. They reappear after watering, gutters are fine, no insects visible. They ask for ideas.

Possible Cause

Jack DeAngelis suggests antlions (doodlebugs), which create conical pits in loose, dry soil to trap ants. However, a photo would confirm. Other possibilities: solitary bee/wasp nests, earthworm castings, or soil settling.

Next Steps

• Submit a clear photo for identification.
• Observe at different times (antlions are often hidden at pit bottom).
• If no pest is found, the depressions may be abiotic (water drips, soil structure).